Anjishnu Sarkar
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Previous Organizations / Institutes
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Research Subjects
Anjishnu Sarkar has a total of 3 co-authors. Here are the top co-authors by number of shared publications:
- Abhishek Atreya
Institute of Physics, Bhubaneswar, Odisha 751005, India
2 shared publications - Ajit Mohan Srivastava
Institute of Physics
2 shared publications - Raghavan Rangarajan
School of Arts and Sciences, Ahmedabad University, Navrangpura, Ahmedabad 380009, India
1 shared publication
Latest Publications
- Open Access
Flat directions and gravitino production in SUSY models
Flat directions in supersymmetric models can get large vacuum expectation values in the early Universe which leads to a large mass for gauge bosons and gauginos. We point out that this can then result in enhanced gravitino production because the cross-section for the production of the +/- 1/2 helicity states of the gravitino is proportional to the square of the gaugino masses. We consider gravitino production after inflation in such a scenario and find that the abundance in some cases can be much larger than the upper bound on the gravtino abundance from cosmological constraints unless the flat direction field has a very small vacuum expectation value when it commences oscillating.
Open AccessFlat directions and gravitino production in SUSY models
Flat directions in supersymmetric models can get large vacuum expectation values in the early Universe which leads to a large mass for gauge bosons and gauginos. We point out that this can then result in enhanced gravitino production because the cross-section for the production of the +/- 1/2 helicity states of the gravitino is proportional to the square of the gaugino masses. We consider gravitino production after inflation in such a scenario and find that the abundance in some cases can be much larger than the upper bound on the gravtino abundance from cosmological constraints unless the flat direction field has a very small vacuum expectation value when it commences oscillating.
- Open Access
Spontaneous CP violation in quark scattering from QCD Z(3) interfaces
In this paper, we explore the possibility of spontaneous CP violation in the scattering of quarks and anti-quarks from QCD Z(3) domain walls. The CP violation here arises from the nontrivial profile of the background gauge field $(A_{0})$ between different Z(3) vacua. We calculate the spatial variation of $A_{0}$ across the Z(3) interface from the profile of the Polyakov loop $L(\vec{x})$ for the Z(3) interface and calculate the reflection of quarks and antiquarks using the Dirac equation. This spontaneous CP violation has interesting consequences for the relativistic heavy-ion collision experiments, such as baryon enhancement at high $P_{T}$. It also acts as a source of additional J/$\psi$ suppression. We also discuss its implications for the early universe.Open AccessSpontaneous CP violation in quark scattering from QCD Z(3) interfaces
In this paper, we explore the possibility of spontaneous CP violation in the scattering of quarks and anti-quarks from QCD Z(3) domain walls. The CP violation here arises from the nontrivial profile of the background gauge field $(A_{0})$ between different Z(3) vacua. We calculate the spatial variation of $A_{0}$ across the Z(3) interface from the profile of the Polyakov loop $L(\vec{x})$ for the Z(3) interface and calculate the reflection of quarks and antiquarks using the Dirac equation. This spontaneous CP violation has interesting consequences for the relativistic heavy-ion collision experiments, such as baryon enhancement at high $P_{T}$. It also acts as a source of additional J/$\psi$ suppression. We also discuss its implications for the early universe. - 11 January 2012
- Published by American Physical Society (APS) in Physical Review D
- Vol. 85 (1)
SpontaneousCPviolation in quark scattering from QCDZ(3)interfaces
In this paper, we explore the possibility of spontaneous violation in the scattering of quarks and antiquarks from QCD domain walls. The violation here arises from the nontrivial profile of the background gauge field between different vacua. We calculate the spatial variation of across the Z(3) interface from the profile of the Polyakov loop for the Z(3) interface and calculate the reflection of quarks and antiquarks using the Dirac equation. This spontaneous violation has interesting consequences for the relativistic heavy-ion collision experiments, such as baryon enhancement at high . It also acts as a source of additional suppression. We also discuss its implications for the early Universe. DOI: http://dx.doi.org/10.1103/PhysRevD.85.014009 © 2012 American Physical Society- 11 January 2012
- Published by American Physical Society (APS) in Physical Review D
- Vol. 85 (1)
SpontaneousCPviolation in quark scattering from QCDZ(3)interfaces
In this paper, we explore the possibility of spontaneous violation in the scattering of quarks and antiquarks from QCD domain walls. The violation here arises from the nontrivial profile of the background gauge field between different vacua. We calculate the spatial variation of across the Z(3) interface from the profile of the Polyakov loop for the Z(3) interface and calculate the reflection of quarks and antiquarks using the Dirac equation. This spontaneous violation has interesting consequences for the relativistic heavy-ion collision experiments, such as baryon enhancement at high . It also acts as a source of additional suppression. We also discuss its implications for the early Universe. DOI: http://dx.doi.org/10.1103/PhysRevD.85.014009 © 2012 American Physical Society